期刊
TALANTA
卷 148, 期 -, 页码 46-53出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2015.10.059
关键词
Magnetic carbon nitride nanosheets; Polycyclic aromatic hydrocarbons; Magnetic solid-phase extraction; Gas chromatography-mass spectrometry; Edible oil
资金
- National Natural Science Foundation of China [21475098, 91217309]
- Natural Science Foundation of Hubei Province, China [2014CFA002]
In this study, we proposed a method to fabricate magnetic carbon nitride (CN) nanosheets by simple physical blending. Low-cost CN nanosheets prepared by urea possessed a highly pi-conjugated structure; therefore the obtained composites were employed as magnetic solid-phase extraction (MSPE) sorbent for extraction of polycyclic aromatic hydrocarbons (PAHs) in edible oil samples. Moreover, sample pretreatment time could be carried out within 10 min. Thus, a simple and cheap method for the analysis of PAHs in edible oil samples was established by coupling magnetic CN nanosheets-based MSPE with gas chromatography-mass spectrometry (GC/MS) analysis. Limits of quantitation (LOQs) for eight PAHs ranged from 0.4 to 0.9 ng/g. The intra- and inter-day relative standard deviations (RSDs) were less than 15.0%. The recoveries of PAHs for spiked soybean oil samples ranged from 91.0% to 124.1%, with RSDs of less than 10.2%. Taken together, the proposed method offers a simple and cost-effective option for the convenient analysis of PAHs in oil samples. (C) 2015 Elsevier B.V. All rights reserved.
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